this derivation will be built:
  /nix/store/cgv8nj1qs2xhfqc86pgfmxilj7dw650z-inputDerivation-effect-docs.drv
building '/nix/store/cgv8nj1qs2xhfqc86pgfmxilj7dw650z-inputDerivation-effect-docs.drv'...